我们现在撇开美洲这个对偶制家庭的典型地区不谈吧.We now leave America, the classic soil of the pairing family.对偶体彼此相连于称为着丝粒的缩小的区域.The duplicates are attached to each other at a constricted region called the centromere.考察了加料顺序和相转移催化剂对偶联反应的影响.The ...
His powerful serve was too much for the defending champion.他的大力发球让卫冕冠军难以招架。He will be partnered by Ian Baker, the defending champion.他将和卫冕冠军伊恩·贝克搭档。Francine lost no time in defending herself.弗朗辛立即为自己辩护。...